51444151 has 4 divisors (see below), whose sum is σ = 56120904. Its totient is φ = 46767400.

The previous prime is 51444143. The next prime is 51444157. The reversal of 51444151 is 15144415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51444151 - 2³ = 51444143 is a prime.

It is a super-2 number, since 2×51444151² = 5293001344221602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51444157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2338360 + ... + 2338381.

It is an arithmetic number, because the mean of its divisors is an integer number (14030226).

Almost surely, 2^51444151 is an apocalyptic number.

51444151 is a deficient number, since it is larger than the sum of its proper divisors (4676753).

51444151 is a wasteful number, since it uses less digits than its factorization.

51444151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676752.

The product of its digits is 1600, while the sum is 25.

The square root of 51444151 is about 7172.4578074744. The cubic root of 51444151 is about 371.9164045982.

Adding to 51444151 its reverse (15144415), we get a palindrome (66588566).

The spelling of 51444151 in words is "fifty-one million, four hundred forty-four thousand, one hundred fifty-one".